28

Chain Coupling

Constructed of two-strand chains and two sprockets. Can be

connected and separated without moving the equipment by

winding the chains over and removing them from the sprockets.

Features:

Outstanding Durability

The coupling performs outstanding durability with the torque on the

coupling shared with the surface hardened teeth of the sprockets

and the powerful roller chains that engage with the teeth.

Easy Coupling and Decoupling

Both shafts can be easily coupled or decoupled with a single joint

pin inserted into or extracted from the roller chains.

Absorption of Large Misalignment

The clearances between the chains and sprockets and between

chain components absorb the great positional misalignment of both

shafts.

Models in a Wide Variety

A total of 24 models including 15 models conforming to JIS and 8

other are standardized.

Fit Bore Series

The standard tolerance of bore processing is based on H7 and support to the tolerances of press fitting too.

Keyway tolerances are in conformity with JIS Js9 and P9.

Body Construction:

Body

The body consists of two dedicated sprockets with hardened teeth and two-strand roller chains. The sprockets are

coupled when the chains are wound around the sprockets, and decoupled with the chains removed; therefore,

transmission power can be coupled or separated without moving the transmission system.

1

Min. Max. Pilot ØD l

RC 3812 9.5 16 8 25 30 99.9 6000 45 64.9 59 61 0.3

RC 4012 11 22 9 32 36 217 61 79.4 75 1.1

RC 4014 11 28 9 43 36 295 69 79.4 84 1.4

RC 4016 16 32 13 50 40 386 77 87.4 92 1.9

RC 5014 16 35 13 53 45 562 86 99.7 101 2.6

RC 5016 18 40 13 60 45 735 96 99.7 111 3.3

RC 5018 18 45 13 70 45 931 3000 107 99.7 122 4.2

RC 6018 22 56 18 85 56 1750 128 123.5 142 7.5

RC 6022 28 71 18 110 56 2370 152 123.5 167 11.4

RC 8018 32 80 23 110 63 3880 170 141.2 186 15.4

RC 8022 40 100 28 140 71 5580 203 157.2 220 23.6

RC 10020 45 110 33 160 80 8780 1800 233 178.8 250 148 35.4

RC 12018 50 125 43 170 90 13200 1500 256 202.7 307 49.5

RC 12022 56 140 53 210 100 17100 1200 304 222.7 357 75.9

RC 16018 63 160 58 224 112 28600 341 254.1 406 107.0

RC 16022 80 200 73 280 140 41700 405 310.1 472 181.6

RC 20018 88 205 85 294 241 57000 800 426 519.5 496 312.2

RC 20022 98 260 95 374 241 71900 600 507 519.5 578 483.0

RC 24022 120 310 117 420 353 129000 600 608 751.1 684 882.4

RC 24026 150 380 147 520 353 157000 500 705 751.1 784 1287.8

Notes:

I

3. the items in regular typeface are made to order and the dimension 'ØD' is just for reference.

RC 3812 - RC 16022 RC 20018 - RC 24026

AL

Die-Cast

2. the range of bore diameter for the RC 4012 to RC 16022 conforms to JIS standards. However, the minimum bore

diameter can be larger bore than the piolt bore. The maximum bore diameter showns the permissible bore standard

smooth transmission with no import or reverse rotation.

AL

Alloy280

388

1. the pilot bores of the items in bold are normally in stock, while in regular typeface are made to order. If you require a

size larger than those specified. Please consult RYDON.

CHAIN COUPLING

Type

II

Casting

MaterialModel No L ØH W

Approx

Wt (kg)

4800

106

130

Torque

@ 50 rpm

(Nm)

ØA

Maximum

speed

(rpm)

1000

Boss (mm)

250

181

75

853600

2500

2000

(Ød) Bore (mm)

Kilowatt Ratings Table

1 5 10 25 50 100 200 300 400 500 600 800RC 3812 16 99.9 0.01 0.05 0.11 0.26 0.52 0.79 1.21 1.58 1.89 2.26 2.58 3.19

RC 4012 22 217 0.02 0.11 0.22 0.58 1.15 1.73 2.63 3.46 4.15 4.96 5.67 7.01

RC 4014 28 295 0.03 0.16 0.32 0.79 1.58 2.36 3.59 4.72 5.66 6.77 7.72 9.56

RC 4016 32 386 0.04 0.21 0.41 1.03 2.06 3.09 4.69 6.17 7.41 8.85 10.1 12.5

RC 5014 35 562 0.06 0.30 0.6 1.5 3 4.48 6.8 8.95 10.7 12.8 14.7 18.1

RC 5016 40 735 0.08 0.39 0.78 1.95 3.91 5.86 8.92 11.7 14.1 16.8 19.2 23.8

RC 5018 45 931 0.10 0.50 0.99 2.48 4.95 7.43 11.3 14.9 17.8 21.3 24.4 30.1

RC 6018 56 1750 0.18 0.93 1.87 4.67 9.33 14.00 21.3 28.00 33.6 40.1 45.9 56.8

RC 6020 60 1850 0.19 0.94 1.89 4.71 9.81 14.71 22.44 29.53 35.4 42.3 48.37 59.8

RC 6022 71 2370 0.25 1.25 2.51 6.31 12.5 18.8 28.6 37.7 45.3 54.1 61.9 76.5

RC 8018 80 3880 0.41 2.07 4.14 10.3 20.7 31.0 47.2 62.1 74.5 89.0 101.0 126.0

RC 8020 90 4520 0.46 2.30 4.61 11.52 24.0 35.9 54.8 72.2 86.4 103.4 118.2 146.1

RC 8022 100 5580 0.59 2.96 5.93 14.8 29.6 44.5 67.2 89 106 127 146 180

RC 10020 110 8780 0.93 4.66 9.33 23.3 46.6 70 106 140 168 200 229 283

RC 12018 125 13200 1.40 7.02 14.0 35.1 70.2 105 160 210 252 302 345 426

RC 12022 140 17100 1.81 9.07 18.1 45.3 90.7 136 206 272 326 390 446 551

RC 16018 160 28600 3.03 15.1 30.3 75.8 151 227 345 455 546 652 746 922

RC 16022 200 41700 4.43 22.1 44.3 110 221 333 506 665 799 954 1090 1350

RC 20018 205 57000 6.06 30.3 60.6 151 303 454 691 909 1090 1300 1490 1840

RC 20022 260 71900 7.63 38.2 76.3 191 382 572 871 1140 1370 1640 1880

RC 24022 310 129000 13.7 68.8 137 344 688 1030 1570 2060 2470 2960 3380

RC 24026 380 157000 16.7 83.7 167 418 837 1250 1900 2510 3010 3600

RC 32022 430 255000 27.2 136 272 680 1360 2040 2850 4080 4900

RC 40020 470 494000 52.6 263 526 1310 2630 3940 5990 7890 9470

RC 40024 590 602000 64.0 320 640 1600 3200 4800 7300 9600

RC 40028 700 717000 76.2 380 762 1900 3800 5700 8690 11400

I

1000 1200 1500 1800 2000 2500 3000 3600 4000 4800 5200 6000

RC 3812 16 99.9 3.88 4.41 5.35 6.25 6.73 8.12 9.44 11 12 14 14.8 16.7

RC 4012 22 217 8.53 9.68 11.6 13.7 14.8 17.9 20.7 24.1 26.3 30.8

RC 4014 28 295 11.64 13.21 15.8 18.7 20.2 24.4 28.3 32.9 35.9 42.1

RC 4016 32 386 15.3 17.3 21 24.4 26.3 31.9 37 43 46.9 54.9

RC 5014 35 562 22.1 25.1 30 35.4 38.3 46.2 53.6 62.4

RC 5016 40 735 28.9 32.9 39.9 46.4 50 61.6 70.4 81.6

RC 5018 45 931 36.6 41.6 50.5 58.8 63.4 76.8 89.2

RC 6018 56 1750 69.1 78.4 95.2 111 120 145

RC 6020 60 1850 72.7 82.5 98.9 117 126 153

RC 6022 71 2370 93.1 105 128 149 161 195

RC 8018 80 3880 153 174 211 246 265

RC 8020 90 4520 146 178 202 242 285

RC 8022 100 5580 219 249 302 352 379

RC 10020 110 8780 345 392 476 554

RC 12018 125 13200 519 590 716

RC 12022 140 17100 671 762

RC 16018 160 28600 1122

RC 16022 200 41700 1640

RC 20018 205 57000

RC 20022 260 71900

RC 24022 310 129000

RC 24026 380 157000

RC 32022 430 255000

RC 40020 470 494000

RC 40024 590 602000 Refer to page 8 for Lubrication method

RC 40028 700 717000

Note: Be sure to follow the procedure on page 6 for the selection of couplings

Model No.Max. bore

dia. (mm)

Max.allowable

transmission

torque at below

50 r/min. (N-m)

Speed of rotation (r/min.)

Unit: kW

II IIILubrication type

Unit: kW

Model No.Max. bore

dia. (mm)

Max.allowable

transmission

torque at below

Speed of rotation (r/min.)

Lubrication type

Lubrication System I :Apply grease regularly on a monthly basis.Lubrication System II :Apply grease regularly on a Weekly basis. or mount the casting filled with grease.Lubrication System III :Mount the casting filled with grease.

28

Casting Construction:

Casting

For ease of mounting and inspection, the casting can be separated at a right to the shaft. The mating part to the hub

finished precisely to hold the hub firmly with no eccentricity. Furthermore, the other hole has a trapezoidal groove into

which an oil seal is inserted for the prevention of oil leakage while holding the sprocket boss flexibly so that the

flexibility of the coupling will not be lost.

The coupling life is notably extended due to the prevention of both lubricant spatter and the infiltration of dust particles

when installing the casting. This ensures effective lubrication. The casting protects the unit from corrosion and ensures

safe operation.

If the coupling with casting is used under frequent start and stop operation or large vibration. Please consult RYDON.

Coating Specifications:

Aluminum die-cast castings are bake coated with melanin resin. Aluminum cast castings are coated with acrylic resin.

Coating Color: orange yellow.

Notes:

1).The castings of the items in regular typeface are made to order.

2).The ZF type oil seal is made by NOK Co.

3).The item marked * has 4 bolts and not 6, as indicated on the drawing.

Selection:

1. Operating Conditions Required for Selection

Daily Operating hours.

Load characteristics and type of motor.

Transmission power (kW) and rotation speed (r/min) of torque (N.m).

Outer diameters of both shafts.

4

Be sure to mount the casting in the following

cases:

1).The coupling is rotated at high speed (see the notes in the

Kilowatt Ratings Table).

2).The coupling is used in an abrasive atmosphere, such as

a place with dust and dirt.

3).The coupling is used in a corrosive atmosphere such as a

humid place.

Oil Seal

Gasket (Rubber Cork)

28

2. Selection Method

Obtain the service factor from the table of service factors on the right-hand side according to the operating

conditions.

Multiply the transmission power (or torque) by the service factor and obtain the correction transmission power

(or correction transmission torques).

Select from the kilowatt ratings table couplings that satisfy the corrected transmission power (or correction

transmission torque) at the operating rotation speed.

If the required shaft diameter exceeds the maximum shaft diameter of the coupling selected. Adopt a coupling

a size larger.

The contact surface pressure may become excessive if a standard key is used. Calculate the contact surface

pressure of the key contact the necessity of using a special key or spline.

If the coupling is directly connected to the motor, select the coupling from the following table of recommended

models for direct motor connection.

Table of service factors (SF)

Load Characteristics Source of power

Motor Turbine

Steam engine gasoline engine (4 Cylinders)

Diesel engine Gas engine

Low fluctuation, low impact, low starting torque, and no reverse rotation

1.0 1.5 2.0

Middle fluctuation, Middle impact, and no reverse rotation (standard load)

1.5 2.0 2.5

High fluctuation, High impact, low starting torque, reverse rotation, and loaded starting

2.0 2.5 3.0

Note:

An increase according to the operating hour of the chain coupling (provided that the rotation speed is 50 r/min.

or more).

8 to 16 hours/days: 0.5

16 hours or more /day: 1.0

The above table shows rough service factor standards. Decide on the service factor according to the

operating conditions.

Reference:

Relationship between torques, transmission, and rotations speed

T: Torque N. m

P: Transmission power kW

n: Rotation speed r/min

5

T= 60000 X P

{ T= 974 X P

} 2π X n n

28

3. Recommended Coupling Models for Direct Motor Connection:

Note: The above motor is of 4-pole type with a totally enclosed external fan.

4. Backlash:

Note: The above figures are calculated value and not guaranteed. Consult your RYDON reprehensive for the

backlash angles of other models.

Fit Bore Series (with Finished Bore):

Processing Details:

Different processing can be set on both sides separately

Finished Bore: Select the desired dimension from list of Applicable Bore and the tolerance from list of Bore

and Keyway Tolerances.

Keyway : Select the desired dimension and the tolerance from list of Bore and Keyway Tolerances.

Tap hole : Check with list of Set Screw Positional Relationships. (Two points on a single side of the hub

with setscrews provided).

7

Motor Output kW Motor Shaft

Dia. mm Model no. Motor Output kW

Motor Shaft Dia. mm

Model no.

0.1 to 0.2 11 RC 3812 5.5 to 7.5 38 RC 5016

0.4 14 RC 3812 11 to 15 42 RC 5018

0.75 19 RC 4012 22 48 RC 6018

1.5 24 RC 4014 30 55 RC 6018

2.2 to 3.7 28 RC 4014 37 to 45 60 RC 6022

Model no.

RC 3812 RC 4012 RC 4014 RC 4016 RC 5014 RC 5016 RC 5018 RC 6018 RC 6022

Backlash (Angle*)

±1.02 ±1.06 ±0.90 ±0.79 ±0.86 ±0.75 ±0.66 ±0.62 ±0.51

Model no.

RC 8018 RC 8022 RC 10022 RC 12018 RC 12022 RC 16018 RC 16022 RC 20018 RC 20022

Backlash (Angle*)

±0.58 ±0.47 ±0.50 ±0.42 ±0.34 ±0.31 ±0.26 ±0.33 ±0.27

Bore Tolerance Keyway Tolerance

Standard Specifications H7 Js9

Semi-Standard Specifications

R7, P7, N7, M7, Js7, G7

P9, F7, E9

14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55 60 65

RC 3812 • • •

RC 4012 • • • • • • • •

RC 4014 • • • • • • • • • • •

RC 4016 • • • • • • • • • • •

RC5014 • • • • • • • • • • • •

RC 5016 • • • • • • • • • • • •

RC 5018 • • • • • • • • • • • • • •

RC 6018 • • • • • • • • • • • • • •

RC 6022 • • • • • • • • • • • • •

RC 8018 • • • • • • • • • • •

RC 8022 • • • • • • • •

New JIS Key

Width mm5 5 5 5 6 6 6 6 8 8 8 8 10 10 10 12 12 14 14 14 16 18 18

Old JIS Key

Width mm5 5 5 5 5 5 5 7 7 7 7 7 10 10 10 10 12 12 12 12 15 15 18

Tolerance

SymbolR7 P7 N7 M7 Js7 G7 H7

Standard

type

Js9

Press

fit

P6

Class 1

F7

Class 2

E9

Tolerance Code R P N M J G H J P F E

-0.016 -0.011 -0.005 0 +0.024 +0.018

-0.034 -0.029 -0.023 -0.018 ±0.009 +0.006 0 +0.022 +0.050

-0.012 +0.010 +0.020

-0.042

-0.020 -0.014 -0.007 0 +0.028 +0.021

-0.041 -0.035 -0.028 -0.021 +0.007 0

-0.015 +0.028 +0.061

-0.051 +0.013 +0.025

-0.025 -0.017 -0.008 0 +0.034 +0.025

-0.050 -0.042 -0.033 -0.025 +0.009 0

-0.018 +0.034 +0.075

-0.061 +0.016 +0.032

-0.030 -0.021 -0.009 0 +0.040 +0.030

-0.060 -0.051 -0.039 -0.030 +0.010 0

Bore Dia. d mm 14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55 60 65

Setscrew M5 M5 M5 M5 M6 M6 M6 M6 M6 M6 M6 M6 M8 M8 M8 M8 M8 M8 M8 M8 M10 M10 M10

Old JIS Key M5 M5 M5

RC 3812

RC 4012

RC 4014

RC 4016

RC 5014

RC 5016

RC 5018

RC 6018

RC 6022

RC 8018

RC 8022

List of Set Screw Positional Relationships:

6

M5

M6

M8

M10

2

3

3.5

5

M5

M6

M8

M10

5

7

10

12

15

18

±0.0150

±0.0180

±0.0215

2.3

2.8

3.3

5

6

8

10

12

14

18

4.3

3.8

4.4

16

19

20

22

24

25

28

30

65

45

48

50

55

60

32

35

38

40

42

New JIS Parallel Key JIS 1301-1996

Bore Dia.

d (mm)Set

screw

Old JIS Parallel Key

Keyway

Depth

KH

Keyway

Depth

KH

Tolerance

Keyway

Depth

KW

Model no.Bore Dia. mm

Set

screw

List of Applicable bore:

List of Bore and Keyway Tolerance

Tolerance Range

(mm)

Bore tolerance (Shaft tolerance : h6)

Press fitting Middle fitting Loose fitting Tolerance

Keyway

Width

KW

±0.0105

±0.0125

±0.015

14

15

16

17

18

I

8

2

Lubrication:

The following three lubrication systems are recommended when using Roller Chain Couplings. The choice depends

on the operating speed. (Refer to the Kilowatt Ratings Table).

Lubrication System I: Apply grease regularly on a monthly basis.

Lubrication System II: Apply grease regularly on a weekly basis, or mount the casing filled with grease.

Lubrication System III: Mount the casting filled with grease, for System III; it is especially important to use high-grade

grease because of grease stick to the inner surface of the case due to centrifugal force, resulting in poor lubrication.

Grease Change Interval for Lubrication System III:

The amount of grease to apply is shown in the table below. If

these amounts are adhered to, there will be slight leakage

during initial operation. But this will soon stop.

Special Use and Service Parts:

Special Use:

Floating Shaft Type:

The standard product can be used as a floating shaft type as

shown in the illustration below if there is a distance between

applicable devices, provided that the shaft is in horizontal;

operation with minimal errors under the following limited

operating conditions.

Operating Conditions:

The shaft is horizontal operation.

The shaft in operation does not rotate in the

reverse direction. The shaft may rotate in the

reverse direction only after the shaft comes to a

prefect stop.

The mounting errors are within the following

ranges.

Angle error α: 0.5° max.

Parallel error ε: 1 % max, of chain pitch.

The maximum operating rotation speed and the

permissible mass of the floating portion are within

the ranges specified in the table.

Decide the length and diameter of the shaft in

comparison with equivalent standard machinery

parts.

9

Model no.

Amount of grease (Kg)

Model no. Amount of grease (Kg)

RC 3812 0.04 RC 8018 0.6

RC 4012 0.07 RC 8022 0.8

RC 4014 0.08 RC 10020 1.4

RC 4016 0.10 RC 12018 2.6

RC 5014 0.12 RC 12022 3.4

RC 5016 0.14 RC 16018 6.6

RC 5018 0.20 RC 16022 8.0

RC 6018 0.32 RC 20018 10.1

RC 6022 0.40 RC 20022 12.2

Operating Conditions

Grease Change Interval

First Change

Change interval after first change

Over 1/2 max. Speed 1000hrs. 2000hrs.

Less than 1/2 max. Speed

2000hrs. 4000hrs.

Apply standard permissible transmission torque:

Modal no. Permissible mass

of floating portion (Kg)

Max. Operating Rotation Speed

(r/min)

RC 3812 19 250

RC 4012 36 250

RC 4014 35 200

RC 4016 35 200

RC 5014 62 150

RC 5016 62 150

RC 5018 61 150

RC 6018 83 100

RC 6022 79 100

RC 8018 136 50

RC 8022 128 50

28

Other Types for Special Use:

Specifications Applicable Model Content Parts different from those

of standard product

Heat Resistant

RCC4012-RCC10020

(Consult your RYDON

representative for other types

whenever required.)

Used if the operating ambient temperature is 60°C to 150°C.

E.g., Oil Seal, Packing, Body, and Casting Modification

Cold Resistant

Used if the operating ambient temperature is -10°C to -40°C. (Consult your RYDON representative for the selection of models.)

E.g., Oil Seal and main Component (Chain and Sprocket)

Casting Rotation Stopper

(with Pin)

To prevent grease leakage with the casting rotation stopper because the operation of the Chain Coupling is start and stop frequently under horizontal use.

E.g., Body and Casting Modification

Vertical Use Used to prevent grease leakage from the casting if the Chain Coupling is mounted vertically.

E.g., Body and Casting Modification

Service Parts: Use the following dedicated parts at the time of servicing.

Service Parts for Chain Coupling:

Part Name Content

Dedicated Roller Chain Dedicated two stand roller Chains and the joint specified in this table are provided.

Joint Pin A joint Pin is provided along with a clip or cotter Pin for retaining.

Oil Seal A dedicated Rubber Oil Seal fit into Casting.

Gasket A cork seat attached to the matching surface of the Casting.

Installation:

1. Place the Oil seal on either the left or right sprocket.

(Place the Oil seal on upper side sprocket when

vertical use.)

2. Bring the sprocket faces close together and

correct the angular and offset misalignment.

Adjust the angular misalignment (α) so that the dimension

‘T’ is the same around the circumference of the sprockets.

The allowable angular misalignment (α) is 1°.

Place a straight edge at the bottom of the corresponding

teeth of the two sprockets and adjust in order to minimize

the allowable offset misalignment (ε) is 2% of the chain

pitch.

When the sprocket speed is 1/3 or more of the maximum

speeds, the allowable angular and offset misalignment are

0.5° and 1% of the chain pitch

9

ε α

T

3. Measure the distance “S” between the sprocket

faces and firmly fasten the set bolt (refer to the

table of dimensions).

4. Fill the grease into the space “S” and lubricate

the chain and teeth with grease, then wrap the

chain around both sprockets and fix with the

joint pin. Insert the joint pin from oil seal side

and confirm that the clip or cotter pin is

securely fastened at counter oil seal side.

5. Fill the required quantity of grease into both

sides of the casting and fasten them firmly.

There will be slight leakage during initial

operation. But this will soon stop. If the grease

still leaks, check the conditions of installation.

Precautions for Additional Processing

Work:

Additional processing work on bore and

keyway:

In the case of processing and finishing the

keyway and bore of a purchased product

provided with a pilot bore (with no bore

processed). Perform the work based on the

outer circumference of the hub. Be careful not

to degrade tooth run out “a” or “b” in that case.

Do not perform additional processing work on

the teeth and outer circumference of the hub.

Model no. RC 3812 RC 4012 RC 4014 RC 4016 RC 5014 RC 5016

Permissible offset error (ε) mm 0.190 0.254 0.254 0.254 0.318 0.318

Permissible angular error (α)° 1 1 1 1 1 1

Permissible distance error (mm)

±0.31 ±0.68 ±0.68 ±0.68 ±0.88 ±0.88

Model no. RC 5018 RC 6018 RC 6022 RC 8018 RC 8022 RC 10020

Permissible offset error (ε) mm 0.318 0.381 0.381 0.508 0.254 0.254

Permissible angular error (α)° 1 1 1 1 1 1

Permissible distance error (mm)

±0.88 ±1.02 ±1.02 ±1.32 ±0.68 ±0.68

Model no. RC 12018 RC 12022 RC 16018 RC 16022 RC 20018 RC 20022

Permissible offset error (ε) mm 0.318 0.318 0.318 0.381 0.381 0.381

Permissible angular error (α)° 1 1 1 1 1 1

Permissible distance error (mm)

±0.88 ±0.88 ±0.88 ±1.02 ±1.02 ±1.02

S

11